26 IGNEOUS ROCKS OF SOUTH-EAST CORNWALL. 



"was present in great abundance, and felspar only to a very smal 

 extent. The minerals shown in the microscopic section are 

 serpentinous pseudomorphs after olivine, augite and magnetite, 

 with lath-shaped sections of pseudomorphs after felspar. It has 

 a decided character of its own, which distinguishes it from the 

 ordinary Lizard serpentine. 



So far as I am aware the Cawsand and Clicker rocks stand 

 quite alone in the district ; but it is by no means certain that 

 this is so. Very m^ich work yet remains to be done in ascertain- 

 ing both the existence and the character of the igneous rocks 

 of South-East Cornwall, and it is impossible to forecast the 

 results. It is hoped that this summary of our present know- 

 ledge may lead to fuller and more accurate information. 



